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Cisco Information Security Specialist (CISS) is an entry-level certification attesting that the holder has demonstrated the foundational knowledge and skills required to install and support a Cisco Self-Defending Network... (Continued) Continue Reading

MPLS and Cisco CCIP certification resources are provided in this introduction to our Cisco CCIP MPLS certification series. MPLS originates in proprietary work from Cisco, but it is widely used for routing traffic across high-speed, high-traffic ... Continue Reading

Inverse multiplexing over ATM (IMA) is a method of optimizing the data transfer rate for individual subscribers in networks that use asynchronous transfer mode (ATM) by dividing the data into multiple concurrent streams that are sent across separate... Continue Reading

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Carrier detect (see modem lights) is a control signal between a modem and a computer that indicates that the modem detects a "live" carrier that can be used for sending and receiving information.Continue Reading

This Cisco certifications guide covers CCNA, CCNP, CCIE and more. Decide whether getting a Cisco certification is necessary for your career, which one you should get and how to study and pass your exam.Continue Reading

Staggered quadrature phase-shift keying (SQPSK), also known as offset quadrature phase-shift keying (OQPSK), is a method of phase-shift keying (PSK) in which the signal carrier-wave phase transition is always 90 degrees or 1/4 cycle at a time... (...Continue Reading